Buy once, use twice
Pongal & Diwali
What both occasions need, what each needs alone, and how much overlap there is to save on.
Two relationships converging on one product from opposite directions. The quantities are summed from both edges, so the total is what to actually buy.Occasion → NEEDS → Product ← NEEDS ← Occasion
7
Shared items
Needed by both
5
Only Pongal
11
Only Diwali
Buy these once
Needed by both occasions — the combined quantity is what to pick up.
| Item | Pongal | Diwali | Buy in total |
|---|---|---|---|
| Akshata | Essential | Essential | 2 packets |
| Camphor | Essential | Essential | 2 packets |
| Clay Diyas | Recommended | Essential | 7 dozen |
| Coconut | Essential | Essential | 5 pieces |
| Jaggery | Essential | Recommended | 3 kg |
| Marigold (Loose) | Recommended | Essential | 4 kg |
| Rangoli Powder | Essential | Essential | 2 sets |
Roughly ₹605 of overlap at list prices — bought once instead of twice.